diff options
Diffstat (limited to 'ldso')
| -rw-r--r-- | ldso/README | 841 | ||||
| -rw-r--r-- | ldso/man/Makefile | 22 | ||||
| -rw-r--r-- | ldso/man/dlopen.3 | 217 | ||||
| -rw-r--r-- | ldso/man/ld.so.8 | 113 | ||||
| -rw-r--r-- | ldso/man/ld.so.texi | 411 | ||||
| -rw-r--r-- | ldso/man/ldconfig.8 | 189 | ||||
| -rw-r--r-- | ldso/man/ldd.1 | 59 |
7 files changed, 0 insertions, 1852 deletions
diff --git a/ldso/README b/ldso/README deleted file mode 100644 index dc37ea65c..000000000 --- a/ldso/README +++ /dev/null @@ -1,841 +0,0 @@ - -Apr 20, 2001 -- Manuel Novoa III - -Inital port for uClibc from debian ld.so_1.9.11-9.tar.gz. - -Removed a.out support. - -****************** original ld.so.lsm file ************************** -Begin3 -Title: Linux shared, dynamic linker and utilities. -Version: 1.9.11 -Entered-date: 01MAY99 -Description: This package contains ld.so, ld-linux.so, ldconfig, - ldd and libdl. -Keywords: dynamic linker, shared library, ld.so, ld-linux.so, - ldconfig, ldd, libdl -Author: david@ods.com (David Engel) -Maintained-by: david@ods.com (David Engel) -Primary-site: tsx-11.mit.edu /pub/linux/packages/GCC - ld.so-1.9.11.tar.gz -Alternate-site: sunsite.unc.edu /pub/Linux/GCC - ld.so-1.9.11.tar.gz -Platform: Linux 2.0.0 or later. -Copying-policy: Copyrighted but freely distributable. -End -********************************************************************* - Original README starts here -********************************************************************* - -This package contains my ELF dynamic linkers (ld-linux.so.1), dynamic -linker library (libdl.so.1) and utilities (ldconfig and ldd) for Linux. - -You need Linux kernel 2.0.0 or later with ELF support compiled in -(i.e. not loaded as a module) to use this package. - -The dynamic linker is used to bootstrap programs and load shared -libraries at startup. The dynamic linker library is used to -dynamically load shared libraries after a program is running. -Ldconfig is used to automatically update the symbolic links to shared -libraries and build the cache file used by the dynamic linker. Ldd is -used to list the shared libraries used by a program. - -Please see the included manual pages for further details. - -To install, simply run "sh instldso.sh" as root. Ready-to-go versions -of all end-products are provided so nothing should need to be compiled -or linked. If you are still using libc5 as your primary development -library, you should use the "--devfiles" option when running -instldso.sh to install the file needed to compile with libdl. - -ELF versions of gcc, binutils and libc are now required to compile -everything, including the old, unsupported, a.out dynamic linker. -Finally, an optimization level of O2 or higher must be used to compile -ld-linux.so and libdl.so due the use of inline functions. - -Notable contributors to this package include Eric Youngdale, Peter -MacDonald, Hongjiu Lu, Linus Torvalds, Lars Wirzenius, Mitch D'Souza, -Rik Faith, Andreas Schwab and Adam Richter (not necessarily in that -order). - -###################### IMPORTANT NOTICES ############################# - -A.OUT SUPPORT: - -As of ld.so-1.9.0, the old, a.out dynamic loader is no longer -officially supported. The code is still included and built, but I -make no promises that it will work. I will accept patches for it, -but they will not be tested by me. - -GLIBC (AKA LIBC6) SUPPORT: - -As of ld.so-1.9.0, the main focus of this package is to ease the -transition to libc6. No significant, new features are expected to be -added. If you need new features, switch to libc6. - -Except for libpthread.so, the sonames of the core libraries provided -with libc6 have been chosen so they do not conflict with those -provided by libc5 and ld.so. However, the current plan is not use -new, nonconflicting sonames for other libraries such as ncurses and -X11. This presents two problems. First, libraries using the same -soname for both libc5 and libc6 can not be placed in the same -directory. Second, the dynamic linkers need to make sure not to load -a library for the wrong version of libc. - -The first problem is easy. Just move the old, libc5-based libraries -to new directories (e.g. /lib/libc5-compat, /usr/lib/libc5-compat, -etc.) and add those directories to /etc/ld.so.conf. Then install the -new, libc6-based versions in the standard places. - -The second problem is more difficult. Ideally, the dynamic linkers -would be changed to perform a complete dependency analysis on every -library to be loaded to make sure the wrong versions aren't used. -This approach doesn't seem worth the added complexity, especially -since we now have symbol versioning for ELF libraries. Instead a -simpler approach will be used, at least initially. - -Ldconfig has been modified to perform a (currently simple) dependency -analysis on libraries and to store an indication in /etc/ld.so.cache -of whether a library is for libc5, libc6 or an unknown libc. The -dynamic linkers then only need to make a simple check at run-time to -make sure they don't load the wrong version of a library. - -The dynamic linker for libc5 provided in this package, has already -been modified to use the new information in /etc/ld.so.cache. For -glibc versions 2.0.1 and earlier, the dynamic linker for libc6 needs -the patch contained in glibc.patch. You should apply the patch and -rebuild glibc before using the new ldconfig. - -As stated above, the dependency analysis currently done by ldconfig is -rather simple. Basically, it looks for the sonames used by the -various versions of libc, libm and libdl. For any approach using a -dependency analysis such as this to work, it is very important that -shared libraries be built with complete dependency information. This -can be done by using the appropriate -l options when running 'gcc --shared'. For example, when building libfoo.so which depends on libc -and libbar, you should add -lbar and -lc gcc command line. - -###################################################################### - -Changes in version 1.9.11: - - Fixed a bug in ld-linux.so where a reference to an - undefined symbol could cause a segfault. - - Added a clarification for LD_PRELOAD to the ld.so manual - page and added a symlink for ld-linux.so (Bug#33123). - - Don't install ldd for Debian except for the m68k arch - because glibc 2.1 now includes it (Bug#35458). - -Changes in version 1.9.10: - - Changed ldconfig to issue a warning and not overwrite a - regular file with a symlink (Bug#30859). - - Changed Debian packaging to conflict with and replace the - ldconfig package (Bug#29398). - -Changes in version 1.9.9: - - Changed ld-linux.so and libdl.so to match glibc by not - allowing user preloads of system libraries into setu/gid - binaries unless the library itself is setuid. - - Fixed problems in ld-linux.so on the sparc architecture - (Juan Cespedes). - -Changes in version 1.9.8: - - Changed ldconfig to allow the expected type for all - libraries in a directory to be optionally specified - (Mark Phillips). See the ldconfig man page. - - Changed ldconfig to use the same type names used in the - change above when the -p option is used. - -Changes in version 1.9.7: - - Changed ldd for m68k to use /lib/ld.so.1 instead of - /lib/ld-linux.so.2. - - Added support for dladdr to libdl.so (Eduard Gode). - - Fixed a small memory leak in libdl.so (Richard Garnish). - - Fixed a bug in ldconfig when the -l option was used on a - filename without a '/' in it. - - Updated the man pages (Bug#6404, Bug#9721, Bug#10652, - Bug#13494 and Bug#14127). They could still use some work. - - No longer install the info page since it's way out of date. - - Fixed minor Debian packaging problems (Bug#13160, - Bug#15577 and Bug#19345). - -Changes in version 1.9.6: - - Changed ldd to not use the glibc dynamic linker when run - on a libc5-based shared library. - - Added a -q option to ldconfig which causes warnings not - to be printed (Bob Tinsley). - - Dropped support for the Debian libdl1-dev package. - - Changed ld-linux.so to be compilable with gcc 2.8.0 (Sven - Verdoolaege) - -Changes in version 1.9.5: - - Fixed a bug in ldd where ld-linux.so.2 was not called - correctly when run on shared libraries. - - Fixed a problem in the previous version where some - Makefiles were not architecture independent. - -Changes in version 1.9.4: - - Fixed a bug in ld.so introduced in the previous version - which broke preloads. - - Turned a.out support back on by default, at least for the - time being. There are no promises to keep it. - -Changes in version 1.9.3: - - Fixed buffer overflow bugs in ld-linux.so and ld.so. - - Changed the README file a little to clarify a couple of - things. - - Changed ldconfig to chroot to the specified directory when - the new -r option is used (Bob Tinsley). - -Changes in version 1.9.2: - - Removed /usr/local/lib from the default /etc/ld.so.conf - for Debian (Bug#8181). - - Changed ldconfig to be 64-bit clean (H.J. Lu). - -Changes in version 1.9.1: - - Changed ldconfig to try to determine which libc a - library is for even if it doesn't have an soname. - - Fixed a bug in ldconfig where an older library using - the glibc naming convention would be used instead of - a newer library. - - Changed to ld-linux.so and libdl.so to not require the - libc5 headers in order to compile. - - Changed ldconfig and ldd to be compilable with either - libc5 or libc6. - -Changes in version 1.9.0: - - Changed to not build the old, a.out dynamic loader by - default. - - Changed instldso.sh to require the --force option to - make sure users read the README file. - - Changed instldso.sh to not install the libdl.so - development files unless the --devfiles option is used. - - Changed instldso.sh to not strip binaries and libraries - if the --no-strip option is used. - - Changed the Debian packaging to put the development files - which conflict with glibc in a new libdl1-dev package. - - Changed ldd to use the glibc dynamic linker, if it is - available, when run on a shared library. - - Changed ld-linux.so to print the load addresses of - libraries, ala glibc, when run by ldd. - - Changed ld-linux.so to allow the libraries listed in - LD_PRELOAD to be separated by white space in addition to - colons. - - Changed ld-linux.so to load the libraries listed in - LD_PRELOAD for setu/gid programs as long as they can be - loaded securely. - - Changed ldconfig to update the symlinks for the dynamic - linkers. - - Changed ldconfig to try to determine if an ELF library is - intended for libc5 or libc6 and save the infomation in the - cache. The mechanism used is rather simplistic and may - need to be enhanced. - - Changed ldconfig to print the type of ELF library when - printing the cache. - - Changed ld-linux.so to only load ELF shared libraries for - use with libc5 or an unknown libc. - -Changes in version 1.8.10: - - Fixed a bug in ldconfig where a symlink could be used - instead of a regular file. - - Fixed a Debian packaging problem for the sparc - architecture. - -Changes in version 1.8.9: - - Changed ldconfig to only cache the symlinks it creates. - This make the behavior of the dynamic linkers consistent - with how they would behave if a cache was not used. - - Changed ldconfig to cache the symlinks that it finds but - use the name of the symlink as the soname instead of the - actual soname. - -Changes in version 1.8.8: - - Minor documentation updates to reflect recent changes. - - Changed ld.so and ld-linux.so to perform more complete - validation on ld.so.cache before using it. - - Changed ldconfig to accept libraries with inconsistent - sonames since glibc is going to use them. A warning is - still printed in debug mode. - - Changed the install script to not strip _dl_debug_state - from ld-linux.so since gdb needs it. - - More sparc fixes (Derrick Brashear). - - Changed ldconfig to not issue a warning when a linker - script disguised as a shared library is found. - - Fixed a bug in ld-linux.so where some registers were - not preserved on the first call to a function causing - problems for non-C-like languages (Tim Renouf). - - Fixed a bug in ld-linux.so where global variables were - not always mapped correctly across dynamically loaded - libraries (Mikihiko Nakao). - - Converted to new Debian source packaging format (Shaya - Potter). - -Changes in version 1.8.6/7: - - Never released as some unofficial patches used these - version numbers. - -Changes in version 1.8.5: - - Fixed a bug in ld.so introduced in the previous changes. - -Changes in version 1.8.4: - - Changed ldconfig to completely ignore symbolic links. - - Changed ldconfig to issue the warning concerning an - inconsistent soname in non-verbose mode. - - Changed ld-linux.so back to not keep ld.so.cache mapped - at all times. - - Changed Debian packaging to compress man pages, strip all - binaries (Bug#5125) and include a shlibs file. - -Changes in version 1.8.3: - - Changed ld-linux.so to process LD_PRELOAD before - /etc/ld.so.preload. - - Fixed a Debian packaging problem where libdl might not - be available if other packages were upgraded at the same - time (Debian Bug#4728). - - Changed ldd to always exit with status 1 if any errors - occur (Debian Bug#4188). - - Fixed some minor problems in instldso.sh (Mike Castle and - Wolfgang Franke). - - Changed ldconfig to issue a warning in verbose mode when - skipping a library because the soname doesn't match. - - More sparc fixes (Miguel de Icaza). - - Don't link with -N when building ld.so (Alan Modra). - - Changed ld-linux.so to better support position-dependant - libraries (NIIBE Yutaka). - -Changes in version 1.8.2: - - Added a texinfo file for ld.so and libdl (Michael - Deutschmann). - - Minor sparc and installation changes (Elliot Lee). - - Added multiple architecture support for Debian (Leland - Lucius). - - Changed libdl to better support RTLD_NEXT (Eric - Youngdale). Note: the exact meaning of ETLD_NEXT is - still not clear in all cases. - - Removed some libc dependencies from libdl. Still need - to remove malloc and free. - -Changes in version 1.8.1: - - Changed ld.so to be compiled as ELF. This also means - that ELF support is now required. A.out support is - still optional. - - Changed ld-linux.so and libdl.so to use the rpath in the - executable instead of in the invoking shared library. - - More m68k fixes (Andreas Schwab). - - Various sparc fixes (Miguel de Icaza). - - Changed ldcnnfig to ignore libraries ending in '~'. - - Changed ldconfig to allow alternative conf and cache - files to be specified on the command-line. - - Changed libdl.so to work when dlsym is passed a NULL - handle pointer. - -Changes in version 1.8.0: - - Changed ld-linux.so to be more liberal when checking to - see if a library is already loaded. This should avoid - the duplicate loading problem for programs linkeed with - the -rpath option. - - Various m68k fixes (Andreas Schwab). - - Changed ld.so to only use LD_AOUT_LIBRARY_PATH and - LD_AOUT_PRELOAD and ld-linux.so to only use - LD_LIBRARY_PATH and LD_PRELOAD. LD_ELF_LIBRARY_PATH - and LD_ELF_PRELOAD are no longer supported. - - Changed ld-linux.so to allow debugging of shared and - dynamically loaded libraries (H.J. Lu, Andreas Schwab). - - Changed ld-linux.so to preload ELF shared libraries - listed in /etc/ld.so.preload. This allows secure - preloads, even for setuid/setgid programs. - - Changed ld-linux.so to keep ld.so.cache mapped at all - times. - - Changed ldconfig to allow #-style comments in ld.so.conf. - - Removed various compiler warnings (Richard Sladkey and - David Engel). - - Changed ldd to work on ELF shared libraries. This may - need a little more work. - -Changes in version 1.7.14: - - Changed ldconfig to recognize ELF shared libraries - generated by post-2.6 versions of ld (Andreas Schwab). - - Changed ldconfig to not remove stale links that do not - have a version number since they may be needed by ld. - -Changes in version 1.7.13: - - Fixed a problem in ld-linux.so where a program linked - with a shared library that was not used could result in - a segmentation fault (H.J. Lu). - -Changes in version 1.7.12: - - Fixed a problem in libdl.so where the wrong library - could be marked as global when RTLD_GLOBAL was used - (Lars Heete). - - Installed dlfcn.h with libdl.so instead of requiring - it to be supplied with libc. - - Removed support for libldso.a since it was nearly - impossible to use anyway. - - Changed ldd to detect when the program being checked - exited abnormally. - -Changes in version 1.7.11: - - Changed ld.so and ld-linux.so to delete all variations - of LD_PRELOAD and LD_LIBRARY_PATH for set[ug]id programs, - This makes it harder for broken set[ug]id programs to be - compromised. - - Fixed a problem in libdl.so where dlsym would not accept - the handle returned from dlopen(0, *). - -Changes in version 1.7.10: - - Changed ld-linux.so and libdl.so to support RTLD_GLOBAL - (Eric Youngdale). - -Changes in version 1.7.9: - - Fixed a problem in ld-linux.so in detecting when the - new user/group information is provided by the kernel. - - Fixed a problem in ld-linux.so where a buffer could be - overflowed if a large number of libraries were loaded - (Thomas Moore). - -Changes in version 1.7.8: - - Changed the Makefiles and install scripts to support - a.out- and ELF-only configurations. - - Changed ld-linux.so to use the user/group information - provided by linux 1.3.23+ instead of making syscalls - to get it. - - Changed libdl.so to support RTLD_NEXT (Glenn Fowler). - - Changed libdl.so to only execute the fini sections - instead of completely closing libraries at exit (Glenn - Fowler). - - Changed ld.so and ld-linux.so to print the required - cache version when a mismatch is detected. - - Changed ld-linux.so to not require on /dev/zero (Ralph - Loader). - - Minor m68k cleanups (Andreas Schwab). - -Changes in version 1.7.7: - - Fixed problems compiling with recent 1.3.x kernels. - - Changed ld-linux.so to not use MAP_DENYWRITE until the - permission issue regarding it is resolved. - -Changes in version 1.7.6: - - Fixed a bug in ld-linux.so dealing with a zero-length - LD_{ELF_}PRELOAD. - - Changed ld.so and ld-linux.so to truncate all variations - of LD_PRELOAD and LD_LIBRARY_PATH for set[ug]id programs. - -Changes in version 1.7.5: - - Changed ldconfig to recognize libraries without any - version number (eg. libXYZ.so). - - Changed ldconfig to not generate a corrupt cache when - the disk is full or other write errors occur. - - Changed ld-linux.so to map files with MAP_DENYWRITE to - keep them from being changed while the file is in use - (Rick Sladkey). - - Changed libdl to not overwrite the scope pointer of a - library if it was already loaded (H.J. Lu). - - Changed ld-linux.so so gdb can be used on constructors - (Eric Youngdale). - - Changed ldconfig to ignore ELF libraries where the soname - does not match the file name on the assumption that it is - a used at compile-time (eg. libcurses.so -> libncruses.so). - -Changes in version 1.7.4: - - Changed ld-linux.so and libdl to use the appropriate - rpaths when searching for shared libraries (Eric - Youngdale). - - Changed ld-linux.so to search rpath before using the - cache. This more closely conforms to the IBCS standard. - -Changes in version 1.7.3: - - Changed ld-linux.so to only print a library name the - first time it is loaded when run from ldd. - - Fixed a bug in ldconfig where an invalid cache could be - generated if a directory was specified multiple times in - ld.so.conf. - - Changed ld-linux.so so it will return the address of a - weak symbol when called from dlsym in libdl (Eric - Youngdale. - -Changes in version 1.7.2: - - Changed libdl.so again to fix the undefined foobar - problem. - -Changes in version 1.7.1: - - Changed libdl so it will compile at optimization level - O3 or higher. - - Changed ldconfig to always create the cache file with - mode 644. - - Changed ldconfig to not ingore valid symlinks. - - Changed ldconfig to use the library name as the soname - for ELF libraries that do not have an soname entry. - - Changed ld-linux.so to print the actual, requested library - name at the time it is loaded instead of trying to figure - it out after the fact. - -Changes in version 1.7.0: - - Changed ldconfig to read the actual soname from the image - for ELF libraries and make it available to ld-linux.so. - The soname for DLL libraries is still determined by - truncating the minor numbers from the image file name. - - Changed ldconfig to no longer support the undocumented - sort options. - - Changed ld.so to require a valid cache to find libraries - in directories specified in ld.so.conf. /usr/lib and /lib - are still searched as a last resort. Ld-linux.so already - operated this way. - - Fixed a bug in libldso.a where the arguments to - shared_loader were not parsed correctly (Wolfram Gloger). - - Added support for RELA-style relocations under Linux/68k - (Andreas Schwab). - - Changed ld-linux.so to only map the cache once for all - libraries instead of individually for each library. - - Changed ld-linux.so continue searching the cache instead of - giving up when failing to load the first entry found. - - Changed ld-linux.so to produce output similar to ld.so when - run from ldd or when errors occur. - -Changes in version 1.6.7: - - Changed the install scripts to make sure that ld.so and - ld-linux.so are always usable. - - Added support for Linux/Sparc (Eric Youngdale). - - Added support for Linux/68k (Andreas Schwab). - - Fixed various bugs in ld-linux.so dealing with closing - files, unmapping memory, dereferencing NULL pointers and - printing library names (David Engel, Eric Youngdale and - Andreas Schwab). - - Replaced the manual page for libdl with a freely - distributable one (Adam Richter). - - Fixed a bug in ld-linux.so where LD_LIBRARY_PATH and - LD_PRELOAD were not cleared for setuid/setgid programs. - - Fixed a bug in libdl where dlsym would not return the - correct address of a symbol if it was redefined in another - library (Oleg Kibirev). - - Changed ld-linux.so to use the following order to search - for libraries: LD_{ELF_}LIBRARY_PATH, ld.so.cache, rpath, - /usr/lib and /lib. - - Changed ld-linux.so to not needlessly allocate memory when - using ld.so.cache. - -Changes in version 1.6.6: - - Changed ldconfig to not warn about removing stale links - unless the -v option is specified. - - Added manual pages for libdl (from FreeBSD/Sun) - - Fixed a bug in ld.so dealing with preloading of objects - generated by recent versions of ld (Mitch D'Souza). - - Fixed bugs in ldd where some errors were either not - detected or not printed. - - Fixed a bug in ld-linux.so where the trailing nul in a - library name was not being copied (Owen Taylor). - -Changes in version 1.6.5: - - Changed ldconfig to remove stale symbolic links. - - Added debug hooks in ld-linux.so and libdl.so to be used - by a future version of gdb (Eric Youngdale). - -Changes in version 1.6.4: - - Change ld-linux.so to print on stdout instead of stderr - when run from ldd. - - Added support for Debian GNU/Linux packaging. - -Changes in version 1.6.3: - - Fixed a bug in libdl when closing a library (H.J. Lu). - -Changes in version 1.6.2: - - Changed the error message printed by ldd when a file is - not a.out or ELF. It used to only list a.out formats. - - Changed ldconfig to no longer cache and set up links for - ld-linux.so. - - Changed ld-linux.so and libdl to not conflict with upcoming - changes in kernel header files. - - Changed ld-linux.so to not print preloaded libraries. - -Changes in version 1.6.1: - - Updated the installation script. - - Changed ld.so and ld-linux.so to look for LD_AOUT_PRELOAD - and LD_ELF_PRELOAD, respectively, before LD_PRELOAD. - - Changed ld.so and ld-linux.so to use LD_AOUT_LIBRARY_PATH - and LD_ELF_LIBRARY_PATH, respectively, instead of - AOUT_LD_LIBRARY_PATH and ELF_LD_LIBRARY_PATH. - -Changes in version 1.6.0: - - Changed ldconfig to process libraries which do not have - a minor version or patch level number. - - Incorporated ld-linux.so and libdl.so. - - Changed ld.so and ld-linux.so to not miss entries in the - cache when the fully qualified library is requested. - - Changed ldconfig to use stdout instead of stderr when - printing the cache. - -Changes in version 1.5.3: - - LD_PRELOAD enhancements (Tristan Gigold). - - LD_PRELOAD patch for linux-68k (Andreas Schwab). - -Changes in version 1.5.2: - - More ELF changes (Mitch D'Souza). - - Changed ldconfig to also update the link for ld-linux.so. - -Changes in version 1.5.1: - - More ELF and LD_PRELOAD changes (Mitch D'Souza). - -Changes in version 1.5.0: - - Chnaged all executables to QMAGIC (Mitch D'Souza and Rick - Sladkey). - - Added preliminary support for ELF to ldd and ldconfig (Eric - Youndale and H.J. Lu). - - Added support for LD_PRELOAD to ld.so (Mitch D'Souza). - - Removed the "advertising" clause from the copyright notices - in all source files. - -Changes in version 1.4.4: - - Changed ldconfig to support QMAGIC libraries. - - Fixed a bug in ld.so where some of the error messages had - transposed arguments. - -Changes in version 1.4.3: - - Fixed an obscure bug in ld.so where an index was not being - incremented when a library was not found using the cache. - -Changes in version 1.4.2: - - Changed ldconfig to issue a warning and continue instead - of an error and exiting when a link can't be updated. - This is useful when some libraries are imported on read- - only file systems, such as an NFS mounted /usr. - - Changed ld.so to be more robust in searching for libraries. - A library is not considered found unless it can actually be - loaded. If a library is not found using the cache, the - standard directories are searched as in pre-cache versions. - -Changes in version 1.4.1: - - Fixed minor Makefile problems. - - Added support for linux-68k. - - Fixed a bug in ld.so where libraries with absolute paths - were not handled correctly. - - Changed ld.so to ignore the directory in the names of - shared libraries by default. This allows older libraries - with absolute paths, such as the XView libraries, to take - advantage of the cache support. - - Added a minimal usage message to ldconfig. - -Changes in version 1.4: - - Fixed bug in ld.so where minor version numbers were not - reported correctly when a minor version incompatibility - was found. - - Fixed bug in ldconfig where libraries with subversion - numbers greater than 9 were not compared correctly. - - Added Mitch D'Souza's support for suppressing warning - messages from ld.so about minor version incompatibilities. - - Added Mitch D'Souza's support for using a cache to speed - up searching for libraries in the standard directories. - - Added Mitch D'Souza's support for a debugging version of - ld.so. Link with -lldso if you think you are experiencing - dynamic linker problems. - -Changes in version 1.3: - - Added support for libraries using absolute pathnames. If I - had known that the XView libraries used them, I would have - added this earlier. - - Fixed a bug handling old libraries using a pathname beginning - with '/' or '/lib/'. - -Changes in version 1.2a: - - Fixed a minor bug in ldd which caused all files, specifically - scripts, to be recognized as binaries. Thanks to Olaf Flebbe - for reporting it. - -David Engel -david@sw.ods.com diff --git a/ldso/man/Makefile b/ldso/man/Makefile deleted file mode 100644 index d36225f52..000000000 --- a/ldso/man/Makefile +++ /dev/null @@ -1,22 +0,0 @@ -# Makefile for uClibc -# -# Copyright (C) 2000,2001,2005 Erik Andersen <andersen@uclibc.org> -# -# Derived in part from the Linux-8086 C library, the GNU C Library, and several -# other sundry sources. Files within this library are copyright by their -# respective copyright holders. -# -# Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. -# - -include ../Config.mk - -ALL = #ld.so.info - -all: $(ALL) - -ld.so.info: ld.so.texi - makeinfo $< - -clean: - $(RM) $(ALL) *~ diff --git a/ldso/man/dlopen.3 b/ldso/man/dlopen.3 deleted file mode 100644 index 0907aed9c..000000000 --- a/ldso/man/dlopen.3 +++ /dev/null @@ -1,217 +0,0 @@ -.\" -*- nroff -*- -.\" Copyright 1995 Yggdrasil Computing, Incorporated. -.\" written by Adam J. Richter (adam@yggdrasil.com), -.\" with typesetting help from Daniel Quinlan (quinlan@yggdrasil.com). -.\" -.\" This is free documentation; you can redistribute it and/or -.\" modify it under the terms of the GNU General Public License as -.\" published by the Free Software Foundation; either version 2 of -.\" the License, or (at your option) any later version. -.\" -.\" The GNU General Public License's references to "object code" -.\" and "executables" are to be interpreted as the output of any -.\" document formatting or typesetting system, including -.\" intermediate and printed output. -.\" -.\" This manual is distributed in the hope that it will be useful, -.\" but WITHOUT ANY WARRANTY; without even the implied warranty of -.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -.\" GNU General Public License for more details. -.\" -.\" You should have received a copy of the GNU General Public -.\" License along with this manual; if not, see -.\" <http://www.gnu.org/licenses/>. -.\" -.TH DLOPEN 3 "16 May 1995" "Linux" "Linux Programmer's Manual" -.SH NAME -dlclose, dlerror, dlopen, dlsym \- Programming interface to dynamic linking loader. -.SH SYNOPSIS -.B #include <dlfcn.h> -.sp -.BI "void *dlopen (const char *" "filename" ", int " flag "); -.br -.BI "const char *dlerror(void);" -.br -.BI "void *dlsym(void *"handle ", char *"symbol ");" -.br -.BI "int dladdr(void *"address ", Dl_info *"dlip ");" -.br -.BI "int dlclose (void *"handle "); -.sp -Special symbols: -.BR "_init" ", " "_fini" ". " -.SH DESCRIPTION -.B dlopen -loads a dynamic library from the file named by the null terminated -string -.I filename -and returns an opaque "handle" for the dynamic library. -If -.I filename -is not an absolute path (i.e., it does not begin with a "/"), then the -file is searched for in the following locations: -.RS -.PP -A colon-separated list of directories in the user's -\fBLD_LIBRARY\fP path environment variable. -.PP -The list of libraries specified in \fI/etc/ld.so.cache\fP. -.PP -\fI/usr/lib\fP, followed by \fI/lib\fP. -.RE -.PP -If -.I filename -is a NULL pointer, then the returned handle is for the main program. -.PP -External references in the library are resolved using the libraries -in that library's dependency list and any other libraries previously -opened with the -.B RTLD_GLOBAL -flag. -If the executable was linked -with the flag "-rdynamic", then the global symbols in the executable -will also be used to resolve references in a dynamically loaded -library. -.PP -.I flag -must be either -.BR RTLD_LAZY , -meaning resolve undefined symbols as code from the dynamic library is -executed, or -.BR RTLD_NOW , -meaning resolve all undefined symbols before -.B dlopen -returns, and fail if this cannot be done. -Optionally, -.B RTLD_GLOBAL -may be or'ed with -.IR flag, -in which case the external symbols defined in the library will be -made available to subsequently loaded libraries. -.PP -If the library exports a routine named -.BR _init , -then that code is executed before dlopen returns. -If the same library is loaded twice with -.BR dlopen() , -the same file handle is returned. The dl library maintains link -counts for dynamic file handles, so a dynamic library is not -deallocated until -.B dlclose -has been called on it as many times as -.B dlopen -has succeeded on it. -.PP -If -.B dlopen -fails for any reason, it returns NULL. -A human readable string describing the most recent error that occurred -from any of the dl routines (dlopen, dlsym or dlclose) can be -extracted with -.BR dlerror() . -.B dlerror -returns NULL if no errors have occurred since initialization or since -it was last called. (Calling -.B dlerror() -twice consecutively, will always result in the second call returning -NULL.) - -.B dlsym -takes a "handle" of a dynamic library returned by dlopen and the null -terminated symbol name, returning the address where that symbol is -loaded. If the symbol is not found, -.B dlsym -returns NULL; however, the correct way to test for an error from -.B dlsym -is to save the result of -.B dlerror -into a variable, and then check if saved value is not NULL. -This is because the value of the symbol could actually be NULL. -It is also necessary to save the results of -.B dlerror -into a variable because if -.B dlerror -is called again, it will return NULL. -.PP -.B dladdr -returns information about the shared library containing the memory -location specified by -.IR address . -.B dladdr -returns zero on success and non-zero on error. -.PP -.B dlclose -decrements the reference count on the dynamic library handle -.IR handle . -If the reference count drops to zero and no other loaded libraries use -symbols in it, then the dynamic library is unloaded. If the dynamic -library exports a routine named -.BR _fini , -then that routine is called just before the library is unloaded. -.SH EXAMPLES -.B Load the math library, and print the cosine of 2.0: -.RS -.nf -.if t .ft CW -#include <dlfcn.h> - -int main(int argc, char **argv) { - void *handle = dlopen ("/lib/libm.so", RTLD_LAZY); - double (*cosine)(double) = dlsym(handle, "cos"); - printf ("%f\\n", (*cosine)(2.0)); - dlclose(handle); -} -.if t .ft P -.fi -.PP -If this program were in a file named "foo.c", you would build the program -with the following command: -.RS -.LP -gcc -rdynamic -o foo foo.c -ldl -.RE -.RE -.LP -.B Do the same thing, but check for errors at every step: -.RS -.nf -.if t .ft CW -#include <stdio.h> -#include <dlfcn.h> - -int main(int argc, char **argv) { - void *handle; - double (*cosine)(double); - char *error; - - handle = dlopen ("/lib/libm.so", RTLD_LAZY); - if (!handle) { - fputs (dlerror(), stderr); - exit(1); - } - - cosine = dlsym(handle, "cos"); - if ((error = dlerror()) != NULL) { - fputs(error, stderr); - exit(1); - } - - printf ("%f\\n", (*cosine)(2.0)); - dlclose(handle); -} -.if t .ft P -.fi -.RE -.SH ACKNOWLEDGEMENTS -The dlopen interface standard comes from Solaris. -The Linux dlopen implementation was primarily written by -Eric Youngdale with help from Mitch D'Souza, David Engel, -Hongjiu Lu, Andreas Schwab and others. -The manual page was written by Adam Richter. -.SH SEE ALSO -.BR ld(1) , -.BR ld.so(8) , -.BR ldconfig(8) , -.BR ldd(1) , -.BR ld.so.info . diff --git a/ldso/man/ld.so.8 b/ldso/man/ld.so.8 deleted file mode 100644 index 59ec8530d..000000000 --- a/ldso/man/ld.so.8 +++ /dev/null @@ -1,113 +0,0 @@ -.TH ld.so 8 "14 March 1998" -.SH NAME -ld.so/ld-linux.so \- dynamic linker/loader -.SH DESCRIPTION -.B ld.so -loads the shared libraries needed by a program, prepares the program -to run, and then runs it. -Unless explicitly specified via the -.B \-static -option to -.B ld -during compilation, all Linux programs are incomplete and require -further linking at run time. -.PP -The necessary shared libraries needed by the program are searched for -in the following order -.IP o -Using the environment variable -.B LD_LIBRARY_PATH -.RB ( LD_AOUT_LIBRARY_PATH -for a.out programs). -Except if the executable is a setuid/setgid binary, in which case it -is ignored. -.IP o -From the cache file -.BR /etc/ld.so.cache -which contains a compiled list of candidate libraries previously found -in the augmented library path. -.IP o -In the default path -.BR /usr/lib , -and then -.BR /lib . -.SH ENVIRONMENT -.TP -.B LD_LIBRARY_PATH -A colon-separated list of directories in which to search for -ELF libraries at execution-time. -Similar to the -.B PATH -environment variable. -.TP -.B LD_PRELOAD -A whitespace-separated list of additional, user-specified, ELF shared -libraries to be loaded before all others. -This can be used to selectively override functions in other shared libraries. -For setuid/setgid ELF binaries, only libraries in the standard search -directories that are also setgid will be loaded. -.TP -.B LD_TRACE_LOADED_OBJECTS -If present, causes the program to list its dynamic library dependencies, -as if run by ldd, instead of running normally. -.TP -.B LD_BIND_NOW -If present, causes the dynamic linker to resolve all symbols at program -startup instead of when they are first referenced. -.TP -.B LD_AOUT_LIBRARY_PATH -A colon-separated list of directories in which to search for -a.out libraries at execution-time. -Similar to the -.B PATH -environment variable. -.TP -.B LD_AOUT_PRELOAD -The name of an additional, user-specified, a.out shared library to be loaded -after all others. -This can be used to selectively override functions in other shared libraries. -.TP -.B LD_NOWARN -Suppress warnings about a.out libraries with incompatible minor -version numbers. -.TP -.B LD_KEEPDIR -Don't ignore the directory in the names of a.out libraries to be loaded. -Use of this option is strongly discouraged. -.SH FILES -.PD 0 -.TP 20 -.B /lib/ld.so -a.out dynamic linker/loader -.TP 20 -.B /lib/ld-linux.so.* -ELF dynamic linker/loader -.TP -.B /etc/ld.so.cache -File containing a compiled list of directories in which to search for -libraries and an ordered list of candidate libraries. -.TP -.B /etc/ld.so.preload -File containing a whitespace separated list of ELF shared libraries to -be loaded before the program. -libraries and an ordered list of candidate libraries. -.TP -.B lib*.so* -shared libraries -.PD -.SH SEE ALSO -.BR ldd (1), -.BR ldconfig (8). -.SH BUGS -.LP -Currently -.B ld.so -has no means of unloading and searching for compatible or newer version of -libraries. -.PP -.B ld.so -functionality is only available for executables compiled using libc version -4.4.3 or greater. -.SH AUTHORS -David Engel, Eric Youngdale, Peter MacDonald, Hongjiu Lu, Linus -Torvalds, Lars Wirzenius and Mitch D'Souza (not necessarily in that order). diff --git a/ldso/man/ld.so.texi b/ldso/man/ld.so.texi deleted file mode 100644 index 4e5fb841b..000000000 --- a/ldso/man/ld.so.texi +++ /dev/null @@ -1,411 +0,0 @@ -\input texinfo @c -*-texinfo-*- -@c %**start of header -@setfilename ld.so.info -@settitle ld.so : Dynamic-Link Library support -@c %**end of header - -@ifinfo -This file documents the dynamic-link support libraries and utilities for the -Linux OS, version 1.8.1. - -Copyright 1996 Michael Deutschmann - -This document is subject to the GNU General Public License as published by -the Free Software foundation, version 2 or later (your choice). - -Note: The software described in this document is under a different copyright -and license. - -@end ifinfo - -@titlepage -@title ld.so -@subtitle Dynamic Link library support for the Linux OS. -@author David Engel -@author Eric Youngdale -@author Peter Macdonald -@author Hongjiu Lu -@author Mitch D'Souza -@author Michael Deutschmann (this documentation) - -@page -Copyright @copyright{} 1996 Michael Deutschmann - -This document is subject to the GNU General Public License as published by -the Free Software foundation, version 2 or later (your choice). - -Note: The software described in this document is under a different copyright -and license. -@end titlepage - -@ifinfo -@node Top -@top - -The @code{ld.so} module provides dynamic linked library support in Linux. -This file documents @code{ld.so} and its companion software. - -@menu -* intro:: Introduction - -* ld.so:: The dynamic linker core program -* ldd:: A utility to print out dependencies -* ldconfig:: A utility to maintain the cache and symlinks -* libdl:: Manual dynamic linking library -@end menu - -@end ifinfo - -@node intro -@unnumbered Introduction - -The @code{ld.so} suite contains special files and utilities needed for linux -to handle @dfn{dynamic libraries}. - -Ordinary static libraries (@file{lib*.a} files) are included into executables -that use their functions. A file that only uses static libraries needs less -intelligence to load, but takes up more space. If many executables use the -same library, there can be much wastage of storage space, since multiple -copies of the library functions are scattered across the executables. -However, static libraries are easier to make. - -Dynamic libraries (@file{lib*.so*} files) are not copied into executables --- -the executable is written in such a way that it will automatically load the -libraries. In linux, the executable will first load the special library -@code{ld.so} or @code{ld-linux.so}, which contains the intelligence -to load further dynamic libraries. Since multiple files end up getting -executable data from the same file, dynamic libraries are also known as -shared libraries. - -Linux executables come in two flavors, @sc{elf} and a.out. - -a.out is the original executable format used by Linux. It has somewhat less -overhead than @sc{elf}. However creating shared libraries for a.out is -@emph{very} involved, and each a.out shared library must be explicitly -registered. - -@sc{elf} is a more recent format, which supports a much simpler method of -creating libraries. @sc{elf} libraries may also be linked manually -(@pxref{libdl}). - -Since many library authors prefer @sc{elf} and no longer release shared a.out -libraries, a.out is moribund on Linux. This version of the @code{ld.so} can -be compiled to support only @sc{elf}, or to support both formats. (The last -release of ld.so to support a.out alone was 1.8.0.) - -@node ld.so -@chapter @code{ld.so}: Dynamic linker core - -@code{ld.so} works behind the scenes to handle dynamic libraries in Linux. -Users will almost never have to deal with it directly, but in special cases -one can send instructions to it through environment variables. Also, if -something is wrong with your libraries (usually an incorrect version) ld.so -will give error messages. - -Actually @code{ld.so} is the a.out linker. The new @sc{elf} executables are -handled by a related program @code{ld-linux.so}. - -@menu -* files:: Configuration files used by the suite -* environment:: Environment settings that tweak @code{ld.so} -* errors:: Complaints @code{ld.so} might make -@end menu - -@node files -@section Configuration Files - -@table @file -@item /etc/ld.so.cache -A file created by @code{ldconfig} and used to speed linking. It's structure -is private to the suite. - -@item /etc/ld.so.conf -A simple list of directories to scan for libraries, in addition to -@file{/usr/lib} and @file{/lib}, which are hardwired. It may contain -comments started with a @samp{#}. - -@item /etc/ld.so.preload -A list of libraries to preload. This allows preloading libraries for -setuid/setgid executables securely. It may contain comments. -@end table - -@node environment -@section Environment Variables - -@table @code -@item LD_AOUT_LIBRARY_PATH -@itemx LD_LIBRARY_PATH -These variables supply a library path for finding dynamic libraries, in the -standard colon seperated format. These variables are ignored when executing -setuid/setgid programs, because otherwise they would be a security hazard. -@code{ld.so} will use @code{LD_AOUT_LIBRARY_PATH} and @code{ld-linux.so} will -use @code{LD_LIBRARY_PATH}. - -@item LD_AOUT_PRELOAD -@itemx LD_PRELOAD -These variables allow an extra library not specified in the executable to be -loaded. Generally this is only useful if you want to override a function. -These are also ignored when running setuid/setgid executables. @code{ld.so} -will use @code{LD_AOUT_PRELOAD} and @code{ld-linux.so} will use -@code{LD_PRELOAD}. - -@item LD_NOWARN -If non-empty, errors about incompatible minor revisions are suppressed. - -@item LD_KEEPDIR -If non-empty, allow executables to specify absolute library names. This -option is deprecated. -@c FIXME: -@c The following are things I noticed in the ld-linux.so source. -@c I don't really understand 'em. Could someone help me? -@c -@c @item LD_BIND_NOW -@c This option is used by the @code{ld-linux.so} only. I don't know -@c what it does. (I suspect, looking at the code, that it specifies -@c "RTLD_NOW" rather than "RTLD_LAZY" mode for the shared libraries.) -@c -@c @item LD_TRACE_LOADED_OBJECTS -@c @itemx LD_WARN -@c These seem to have something to do with the communication between the -@c @code{ld-linux.so} and @code{ldd}. I don't know more. -@end table - -@node errors -@section Errors - -@table @samp -@item Can't find library @var{library} -The executable required a dynamically linked library that ld.so cannot find. -Your symbolic links may be not set right, or you may have not installed a -library needed by the program. - -@item Can't load library @var{library} -The library is corrupt. - -@item Incompatible library @var{library} -@itemx Require major version @var{x} and found @var{y} -Your version of the library is incompatible with the executable. Recompiling -the executable, or upgrading the library will fix the problem. - -@item using incompatible library @var{library} -@itemx Desire minor version >= @var{x} and found @var{y}. -Your version of the library is older than that expected by the executable, -but not so old that the library interface has radically changed, so the -linker will attempt to run anyway. There is a chance that it will work, but -you should upgrade the library or recompile the software. The environment -variable @code{LD_NOWARN} can be used to supress this message. - -@item too many directories in library path -The linker only supports up to 32 library directories. You have too many. - -@item dynamic linker error in @var{blah} -The linker is having trouble handling a binary - it is probably corrupt. - -@item can't map cache file @var{cache-file} -@itemx cache file @var{cache-file} @var{blah} -The linker cache file (generally @file{/etc/ld.so.cache}) is corrupt or -non-existent. These errors can be ignored, and can be prevented by -regenerating the cache file with @code{ldconfig}. -@end table - -@node ldd -@chapter @code{ldd}: Dependency scanner - -@code{ldd} is a utility that prints out the dynamic libraries that an -executable is linked to. - -Actually @code{ldd} works by signalling ld.so to print the dependencies. -For a.out executables this is done by starting the executable with -@code{argc} equal to 0. The linker detects this and prints the dependencies. -(This can cause problems with @emph{very} old binaries, which would run as -normal only with an inappropriate @code{argc}.) - -For @sc{elf} executables, special environment variables are used to tell the -linker to print the dependencies. - -@code{ldd} has a few options: - -@table @samp -@item -v -Print the version number of @code{ldd} itself - -@item -V -Print the version number of the dynamic linker - -@item -d -Report missing functions. This is only supported for @sc{elf} executables. - -@item -r -Report missing objects. This is also only available for @sc{elf} -executables. -@end table - -@node ldconfig -@chapter @code{ldconfig}: Setup program - -This utility is used by the system administrator to automatically set up -symbolic links needed by the libraries, and also to set up the cache file. - -@code{ldconfig} is run after new dynamic libraries are installed, and if the -cache file or links are damaged. It is also run when upgrading the -@code{ld.so} suite itself. - -The @file{/lib} and @file{/usr/lib} directories, and any listed in the file -@file{/etc/ld.so.conf} are scanned by default unless @samp{-n} is used. -Additional directories may be specified on the command line. - -It has the following options: - -@table @samp -@item -D -Enter debug mode. Implies @samp{-N} and @samp{-X}. - -@item -v -Verbose. Print out links created and directories scanned. - -@item -n -Check directories specified on the commandline @emph{only}. - -@item -N -Do not regenerate the cache. - -@item -X -Do not rebuild symbolic links. - -@item -l -Set up symbolic links for only libraries presented on the command line. - -@item -p -Print out the library pathnames in the cache file (@file{/etc/ld.so.cache}) -@end table - -@node libdl -@chapter User dynamic linking library - -The @code{ld.so} package includes a small library of functions -(@code{libdl}) to allow manual dynamic linking. Normally programs are linked -so that dynamic functions and objects are automagically available. These -functions allow one to manually load and access a symbol from a library. -They are only available for @sc{elf} executables. - -@menu -* using libdl:: General points -* functions:: How to use the functions -* example:: A sample program -@end menu - -@node using libdl -@section Overview - -To access this library, add the flag @samp{-ldl} to your compile command when -linking the executable. You also must include the header file -@code{dlfcn.h}. You may also need the flag @samp{-rdynamic}, which enables -resolving references in the loaded libraries against your executable. - -Generally, you will first use @code{dlopen} to open a library. Then you use -@code{dlsym} one or more times to access symbols. Finally you use -@code{dlclose} to close the library. - -These facilities are most useful for language interpreters that provide -access to external libraries. Without @code{libdl}, it would be neccessary -to link the interpreter executable with any and all external libraries -needed by the programs it runs. With @code{libdl}, the interpreter only -needs to be linked with the libraries it uses itself, and can dynamically -load in additional ones if programs need it. - -@node functions -@section Functions - -@deftypefun void *dlopen ( const char @var{filename}, int @var{flags} ) - -This function opens the dynamic library specified by @var{filename} -and returns an abstract handle, which can be used in subsequent calls to -@code{dlsym}. The function will respect the @code{LD_ELF_LIBRARY_PATH} and -@code{LD_LIBRARY_PATH} environment variables. - -@end deftypefun - -The following flags can be used with @code{dlopen}: - -@deftypevr Macro int RTLD_LAZY -Resolve symbols in the library as they are needed. -@end deftypevr - -@deftypevr Macro int RTLD_NOW -Resolve all symbols in the library before returning, and fail if not all can -be resolved. This is mutually exclusive with @code{RTLD_LAZY}. -@end deftypevr - -@deftypevr Macro int RTLD_GLOBAL -Make symbols in this library available for resolving symbols in other -libraries loaded with @code{dlopen}. -@end deftypevr - -@deftypefun int dlclose ( void *@var{handle} ) - -This function releases a library handle. - -Note that if a library opened twice, the handle will be the same. However, -a reference count is used, so you should still close the library as many -times as you open it. - -@end deftypefun - -@deftypefun void *dlsym (void *@var{handle},char *@var{symbol-name}) - -This function looks up the name @var{symbol-name} in the library and returns -it in the void pointer. - -If there is an error, a null pointer will be returned. However, it is -possible for a valid name in the library to have a null value, so -@code{dlerror} should be used to check if there was an error. - -@end deftypefun - -@deftypefun {libdl function} {const char} *dlerror( void ) - -This function is used to read the error state. It returns a human-readable -string describing the last error, or null, meaning no error. - -The function resets the error value each time it is called, so the result -should be copied into a variable. If the function is called more than once -after an error, the second and subsequent calls will return null. - -@end deftypefun - -@node example -@section Example program - -Here is an example program that prints the cosine of two by manually linking -to the math library: - -@example -@c The following was snarfed verbatim from the dlopen.3 man file. -#include <stdio.h> -#include <dlfcn.h> - -int main(int argc, char **argv) @{ - void *handle; - double (*cosine)(double); - char *error; - - handle = dlopen ("/lib/libm.so", RTLD_LAZY); - if (!handle) @{ - fputs (dlerror(), stderr); - exit(1); - @} - - cosine = dlsym(handle, "cos"); - if ((error = dlerror()) != NULL) @{ - fputs(error, stderr); - exit(1); - @} - - printf ("%f\\n", (*cosine)(2.0)); - dlclose(handle); -@} -@end example - -@contents - -@bye diff --git a/ldso/man/ldconfig.8 b/ldso/man/ldconfig.8 deleted file mode 100644 index 82285291f..000000000 --- a/ldso/man/ldconfig.8 +++ /dev/null @@ -1,189 +0,0 @@ -.TH ldconfig 8 "14 March 1998" -.SH NAME -ldconfig \- determine run-time link bindings -.SH SYNOPSIS -ldconfig -.RB [ \-DvqnNX ] -.RB [ \-f\ conf ] -.RB [ \-C\ cache ] -.RB [ \-r\ root ] -.IR directory \ ... -.PD 0 -.PP -.PD -ldconfig -.B \-l -.RB [ \-Dvq ] -.IR library \ ... -.PD 0 -.PP -.PD -ldconfig -.B \-p -.SH DESCRIPTION -.B ldconfig -creates the necessary links and cache (for use by the run-time linker, -.IR ld.so ) -to the most recent shared libraries found in the directories specified -on the command line, in the file -.IR /etc/ld.so.conf , -and in the trusted directories -.RI ( /usr/lib -and -.IR /lib ). -.B ldconfig -checks the header and file names of the libraries it encounters when -determining which versions should have their links updated. -.B ldconfig -ignores symbolic links when scanning for libraries. -.PP -.B ldconfig -will attempt to deduce the type of ELF libs (ie. libc5 or libc6/glibc) -based on what C libs if any the library was linked against, therefore when -making dynamic libraries, it is wise to explicitly link against libc (use -lc). -.PP -Some existing libs do not contain enough information to allow the deduction of -their type, therefore the -.IR /etc/ld.so.conf -file format allows the specification of an expected type. This is -.B only -used for those ELF libs which we can not work out. The format -is like this "dirname=TYPE", where type can be libc4, libc5 or libc6. -(This syntax also works on the command line). Spaces are -.B not -allowed. Also see the -.B -p -option. -.PP -Directory names containing an -.B = are no longer legal -unless they also have an expected type specifier. -.PP -.B ldconfig -should normally be run by the super-user as it may require write -permission on some root owned directories and files. -It is normally run automatically at bootup, from /etc/rc, or manually -whenever new DLL's are installed. -.SH OPTIONS -.TP -.B \-D -Debug mode. -Implies -.B \-N -and -.BR \-X . -.TP -.B \-v -Verbose mode. -Print current version number, the name of each directory as it -is scanned and any links that are created. -Overrides quiet mode. -.TP -.B \-q -Quiet mode. -Don't print warnings. -.TP -.B \-n -Only process directories specified on the command line. -Don't process the trusted directories -.RI ( /usr/lib -and -.IR /lib ) -nor those specified in -.IR /etc/ld.so.conf . -Implies -.BR \-N . -.TP -.B \-N -Don't rebuild the cache. -Unless -.B \-X -is also specified, links are still updated. -.TP -.B \-X -Don't update links. -Unless -.B \-N -is also specified, the cache is still rebuilt. -.TP -.B \-f conf -Use -.B conf -instead of -.IR /etc/ld.so.conf . -.TP -.B \-C cache -Use -.B cache -instead of -.IR /etc/ld.so.cache . -.TP -.B \-r root -Change to and use -.B root -as the root directory. -.TP -.B \-l -Library mode. -Manually link individual libraries. -Intended for use by experts only. -.TP -.B \-p -Print the lists of directories and candidate libraries stored in -the current cache. -.SH EXAMPLES -In the bootup file -.I /etc/rc -having the line -.RS - -/sbin/ldconfig -v - -.RE -will set up the correct links for the shared binaries and rebuild -the cache. -.TP -On the command line -.RS - -# /sbin/ldconfig -n /lib - -.RE -as root after the installation of a new DLL, will properly update the -shared library symbolic links in /lib. - -.SH FILES -.PD 0 -.TP 20 -.B /lib/ld.so -execution time linker/loader -.TP 20 -.B /etc/ld.so.conf -File containing a list of colon, space, tab, newline, or comma spearated -directories in which to search for libraries. -.TP 20 -.B /etc/ld.so.cache -File containing an ordered list of libraries found in the directories -specified in -.BR /etc/ld.so.conf . -.TP -.B lib*.so.version -shared libraries -.PD -.SH SEE ALSO -.BR ldd (1), -.BR ld.so (8). -.SH BUGS -.LP -.BR ldconfig 's -functionality, in conjunction with -.BR ld.so , -is only available for executables compiled using libc version 4.4.3 or greater. -.PP -.BR ldconfig , -being a user process, must be run manually and has no means of dynamically -determining and relinking shared libraries for use by -.BR ld.so -when a new DLL is installed. -.SH AUTHORS -David Engel and Mitch D'Souza. diff --git a/ldso/man/ldd.1 b/ldso/man/ldd.1 deleted file mode 100644 index 20c557847..000000000 --- a/ldso/man/ldd.1 +++ /dev/null @@ -1,59 +0,0 @@ -.\" Copyright 1995-2000 David Engel (david@ods.com) -.\" Copyright 1995 Rickard E. Faith (faith@cs.unc.edu) -.\" Most of this was copied from the README file. Do not restrict distribution. -.\" May be distributed under the GNU General Public License -.TH LDD 1 "14 March 1998" -.SH NAME -ldd \- print shared library dependencies -.SH SYNOPSIS -.B ldd -.RB [ \-vVdr ] -program|library ... -.SH DESCRIPTION -.B ldd -prints the shared libraries required by each program or shared library -specified on the command line. -If a shared library name does not contain a '/', -.B ldd -attempts to locate the library in the standard locations. -To run -.B ldd -on a shared library in the current directory, a "./" must be prepended -to its name. -.SH OPTIONS -.TP -.B \-v -Print the version number of -.BR ldd . -.TP -.B \-V -Print the version number of the dynamic linker, -.BR ld.so . -.TP -.B \-d -Perform relocations and report any missing functions (ELF only). -.TP -.B \-r -Perform relocations for both data objects and functions, and -report any missing objects (ELF only). -.SH BUGS -.B ldd -does not work very well on libc.so.5 itself. -.PP -.B ldd -does not work on a.out shared libraries. -.PP -.B ldd -does not work with some extremely old a.out programs which were -built before -.B ldd -support was added to the compiler releases. -If you use -.B ldd -on one of these programs, the program will attempt to run with argc = 0 and -the results will be unpredictable. -.SH AUTHOR -David Engel. -.SH SEE ALSO -.BR ldconfig (8), -.BR ld.so (8). |